High-quality graphene directly grown on Cu nanoparticles for Cu-graphene nanocomposites

Publication date: 5 February 2018
Source:Materials & Design, Volume 139
Author(s): Shuangyue Wang, Shaobo Han, Guoqing Xin, Jianliang Lin, Ronghua Wei, Jie Lian, Kai Sun, Xiaotao Zu, Qingkai Yu
High-quality graphene was directly grown on the surface of Cu nanoparticles (NPs) via chemical vapor deposition (CVD) and then the graphene-covered Cu NPs were consolidated into dense Cu-graphene nanocomposites at different temperature. The surface of Cu NPs is well protected from oxidation due to the coverage of graphene. Nanocomposite consolidated at 650°C (Cu/G-650) exhibits a hardness of 2.53GPa with no distinctive different electrical resistivity compared with pure Cu, 2 orders of magnitude decrease in wear rate and 175% improvement in the coefficient of friction (COF) were reported for the Cu/G-650 nanocomposite as compared with pure Cu. The formation of graphene tribofilm is attributed for the effective protection of the Cu matrix from wear.

Graphical abstract

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